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Finding the Fourth Proportional to 259,694.42, 390,226.60 and 139,839.98

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Solution

The fourth proportional to 259,694.42, 390,226.60 and 139,839.98 is: 210,128.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,694.42 : 390,226.60 = 139,839.98 : x
  2. Step 2: Convert to fraction form
    259,694.42/390,226.60 = 139,839.98/x
  3. Step 3: Cross multiply
    259,694.42x = 390,226.60 × 139,839.98
  4. Step 4: Simplify right side
    259,694.42x = 54,569,280,915.03
  5. Step 5: Solve for x
    x = 54,569,280,915.03/259,694.42
  6. Step 6: Final answer
    x = 210,128.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.